Cut the watermelon into pieces and reserve a small portion for later. If you mind the seeds, take them out or use a strainer before serving. Blend the watermelon pieces, tomatoes and grapefruit juice. Season with a pinch of salt and pepper. Serve with some of the reserved pieces, torn basil/mint leaves and a drizzle of olive oil. Enjoy.

Note: I’m sure it would also go nicely with some crumbled feta cheese.